> ## Documentation Index > Fetch the complete documentation index at: https://data.ornn.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Get the closed and open-source token price indexes > The Closed Source and Open Source Token Indexes: per weight class, the labs' settled OTPI, each weighted by the tokens it priced that day, in USD per million tokens. Closed is `anthropic`, `openai`, `google`; open is `deepseek`, `minimax`, `xiaomi`, `qwen`, `moonshotai`, `z-ai`, `mistralai`, `meta-llama`. With no dates, returns each class's latest settled day. Without a key, the trailing 3 months: an earlier `startDate` is clamped to the window, and a range that ends before it returns `401`. A Premium or Full key returns the complete history. A day on which a class could not be priced (a lab in it reported no volume on a day it normally does), and a closed day priced from fewer than all three closed labs, is omitted for that class, not returned as null or zero. ## Overview The Closed Source and Open Source Token Indexes: per weight class, the labs' settled OTPI, each weighted by the tokens it priced that day, in USD per million tokens. Returns each class's latest settled day by default, or a `startDate`/`endDate` range; `class` limits the response to `closed` or `open`. Without a key, the trailing 3 months; a Premium or Full key returns the complete history. A day on which a class could not be priced is omitted for that class, not returned as null or zero. The response includes `access: "public-3mo" | "premium" | "full"`. ## OpenAPI ````yaml openapi.yaml GET /api/otpi/weight-class openapi: 3.1.0 info: title: Ornn Data API version: 1.0.0 description: > Read-only REST API for GPU and memory market data. The price index is the going rate of compute in USD per GPU-hour, a weighted average of all verified compute transactions across the market. servers: - url: https://api.ornnai.com security: - bearerAuth: [] tags: - name: Current Prices - name: Historical Prices - name: Analytics - name: Memory - name: Token Prices - name: Workload Cost - name: LLM Coding - name: Forward Curves - name: Token Volume - name: Model Frontier - name: Compute Buyers - name: Power Markets - name: Neo-Cloud Sites - name: Reference paths: /api/otpi/weight-class: get: tags: - Token Prices summary: Get the closed and open-source token price indexes description: > The Closed Source and Open Source Token Indexes: per weight class, the labs' settled OTPI, each weighted by the tokens it priced that day, in USD per million tokens. Closed is `anthropic`, `openai`, `google`; open is `deepseek`, `minimax`, `xiaomi`, `qwen`, `moonshotai`, `z-ai`, `mistralai`, `meta-llama`. With no dates, returns each class's latest settled day. Without a key, the trailing 3 months: an earlier `startDate` is clamped to the window, and a range that ends before it returns `401`. A Premium or Full key returns the complete history. A day on which a class could not be priced (a lab in it reported no volume on a day it normally does), and a closed day priced from fewer than all three closed labs, is omitted for that class, not returned as null or zero. parameters: - name: class in: query description: closed or open. Omit for both. Any other value returns 400. schema: type: string enum: - closed - open - name: startDate in: query description: >- Inclusive start of a settlement-date range in YYYY-MM-DD. Use with `endDate`. Without a key, compute a date within the trailing 3 months at request time. schema: type: string format: date - name: endDate in: query description: >- Inclusive end of a settlement-date range in YYYY-MM-DD. Use with `startDate`. schema: type: string format: date responses: '200': description: > One row per class per settled day, oldest first. `labsPriced` is how many labs in the class carried that day's value. content: application/json: example: success: true access: public-3mo startDate: '2026-01-01' endDate: '2026-01-01' count: 2 data: - date: '2026-01-01' class: closed indexPerMtok: 1 labsPriced: 3 - date: '2026-01-01' class: open indexPerMtok: 1 labsPriced: 8 '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' security: [] x-codeSamples: - lang: bash label: cURL source: | curl "https://api.ornnai.com/api/otpi/weight-class" - lang: python label: Python source: | from datetime import date, timedelta import requests end_date = date.today() start_date = end_date - timedelta(days=30) rows = requests.get( "https://api.ornnai.com/api/otpi/weight-class", params={"startDate": start_date.isoformat(), "endDate": end_date.isoformat()}, ).json()["data"] for r in rows: print(r["date"], r["class"], r["indexPerMtok"]) - lang: javascript label: JavaScript source: > const res = await fetch("https://api.ornnai.com/api/otpi/weight-class?class=open"); const { data } = await res.json(); components: responses: BadRequest: description: A required parameter is missing or invalid. content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: Missing, invalid, or revoked API key. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: Unauthorized message: 'API key required. Use Authorization: Bearer YOUR_API_KEY' schemas: Error: type: object properties: error: type: string example: Bad request message: type: string example: >- Invalid GPU type. Allowed: H100 SXM, H200, A100 SXM4, B200, RTX PRO 6000 WS securitySchemes: bearerAuth: type: http scheme: bearer description: API key passed as a Bearer token. Create one in the dashboard. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.